Relative Frequency Tables

Two-Way Frequency Tables
Relative Frequency Tables

Want some Extra Practice??
These IXL's are great!
https://www.ixl.com/math/grade-6/create-relative-frequency-tables
https://www.ixl.com/math/grade-8/checkpoint-two-way-frequency-tables

What is it?​

A two way table is a way to display frequencies or relative frequencies for two categorical variables. One category is represented by rows and a second category is represented by columns.

​Frequency refers to the number of times an event or a value occurs.

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Frequency​

....There were 72 Students surveyed total
...42 bring lunch ...30 buy lunch
...24 of the students who bring lunch prefer water, 18 juice (24+18=42)
...14 of the students who buy lunch prefer water, 16 juice (14+16=30)

​​This is an example of a 2-Way Frequency Table
Students were asked if they Bring or Buy lunch and what Drink they prefer.

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​Relative Frequency of an event is the number of times the event occurs divided by the total number of trials.

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Relative Frequency​

​This is a relative Frequency Table for the data from our Two-Way Table Example

The percentages come from dividing the outcome by the total # of students in each category.
For example...24/42= 0.572...so 57.2% of the students who bring lunch, prefer water

Multiple Choice

How many total did not attend the school play?

• 63

• 15

• 78

• 221

Multiple Select

What would you divide to find the relative frequencies by row? (Select all that apply.)

• 55/118

• 55/143

• 88/103

• 88/143

Multiple Select

What would you divide to find the relative frequencies by column? (Select all that apply.)

• 55/118

• 55/143

• 88/103

• 88/143

Multiple Choice

A survey asked men and women whether they prefer watching a golf or a tennis tournament. The results are organized in the two-way table. How many men were asked?

• 25

• 35

• 80

• 100

Multiple Choice

A survey asked men and women whether they prefer watching a golf or a tennis tournament. The results are organized in the two-way table. How many women prefer to watch golf?

• 15

• 25

• 35

• 45